Abstract: Examples relate to flexible datacenters or other power loads tolerant of intermittent operation and configured to use power received behind-the-meter. A system may include a set of computing systems powered by behind-the-meter power and a datacenter control system. The datacenter control system may be configured to monitor a set of conditions that includes behind-the-meter power availability at the set of computing systems and perform a weighted analysis using the set of monitored conditions. Based on the weighted analysis, the datacenter control system may be configured to modulate operating attributes of one or more computing systems of the set of computing systems. In some examples, the datacenter control system is a remote master control system in communication with a datacenter control system of a flexible datacenter housing the set of computing systems.

Abstract: Methods and apparatus to control engine speed of a power system are disclosed. An example power system includes: an engine; a generator configured to generate electrical power from mechanical power delivered by the engine; a switched-mode power supply configured to convert the electrical power from the generator to output power; and control circuitry configured to: monitor an input current to the switched-mode power supply; and in response to the input current exceeding a threshold current, incrementally increasing a speed of the engine.

Abstract: A system and method for protecting a genset from pole slip is disclosed. The system may comprise a generator, a prime mover and a controller. The generator includes a stator and a rotor. The prime mover is configured to drive rotation of the rotor. The controller may be configured to: determine mechanical status of the generator based on data associated with a translational displacement of the rotor; determine electrical status of the generator based on (a) a load angle or (b) the load angle and a rate of change of the load angle associated with rotation of the rotor in the stator; determine an operating condition of the generator based on fusion of the mechanical status and the electrical status; if the operating condition is a pole-slip-warning, activate an output member to display or emit a warning; and, if the operating condition is a pole-slip, activate a protective action.

Abstract: A generator system includes a generator including terminals, a generator circuit breaker coupled to the terminals and that couples and decouples the generator from a power grid, multiple sensors, and a controller that operates the generator system. The controller determines whether an active power is less than a reverse active power threshold and whether one or more turbine valves are closed, and determines that a breaker failure has occurred based on the active power being less than the reverse active power threshold and the one or more turbine valves being closed. If the active power remains less than the reverse active power and the turbine valves remain closed after a threshold time period after the trip command, and if a reactive power is less than a reverse reactive power threshold, then a breaker failure has occurred. In response, the controller may transmit another trip command to the generator circuit breaker to initiate the breaker failure protection.

Abstract: A method for the open-loop and closed-loop control of an internal combustion engine, in particular a diesel engine or gas engine, with a generator and asynchronous machine, including the following steps: detecting at least one electrical characteristic variable of the generator, wherein the electrical characteristic variable is selected from current, voltage or frequency; determining a characteristic variable change in the electrical characteristic variable of the generator in a predetermined time interval; comparing the change in characteristic variable with a first threshold value; and in the event that the change in characteristic variable is greater than the first threshold value, changing from a standard speed control of the internal combustion engine to a feed-forward control.

Abstract: A fire detection system may include isolation circuit having an isolation switch coupled with a system line of the fire detection system and configured to isolate a first side of the system line from a second side of the system line. The isolation circuit may also include a controller coupled with the isolation switch. The controller may be configured to detect repetitive, intermittent short circuit activity on the system line and control the isolation switch based on this activity.

Abstract: A system for completing a well, including a generator, and a plurality of electric load components, each electric load component powered by the generator. The system further includes a load shedding control panel that monitors the generator and, if the generator loses functionality, is capable of deactivating one or more of the plurality of electric load components to reduce the electric load.

Abstract: A fire detection system may include isolation circuit having an isolation switch coupled with a system line of the fire detection system and configured to isolate a first side of the system line from a second side of the system line. The isolation circuit may also include a controller coupled with the isolation switch. The controller may be configured to detect repetitive, intermittent short circuit activity on the system line and control the isolation switch based on this activity.

Abstract: A method of determining a liquid volume fraction in a multi-phase gas is disclosed. The method includes: a) measuring a first compressor operating parameter; b) selecting a tentative liquid volume fraction of the gas processed by the compressor; c) based on stored data representing a compressor operative curve for the tentative liquid volume fraction, determining an estimated value of a second compressor operating parameter, as a function of the first compressor operating parameter; d) measuring an actual value of the second compressor operating parameter; e) comparing the actual value of the second compressor operating parameter to the estimated value of the second compressor operating parameter and determining an error therefrom; f) based on the error, selecting a different tentative liquid volume fraction and repeating (c) to (e) until an error value equal to or lower than an error threshold is obtained.

Abstract: An energy management system receives voltage and current data from each of a plurality of fault indicators. Each fault indicator is positioned on a powerline of a power distribution system immediately upstream of a respective one of a plurality of disconnect switches. The energy management system also determines a status of each disconnect switch based on the voltage and current from the plurality of fault indicators.

Abstract: In the presented solution reactive power is compensated for in connection with a power transmission line with an arrangement which comprises at least one transformer and at least one reactive power compensator. The at least one reactive power compensator comprises a voltage source converter and switched elements. The switched elements may be thyristor switched capacitors and/or thyristor switch reactors, for example. The voltage source converter may provide reactive power in a linear or step less manner. The transformer is a three winding transformer having a high voltage side connectable to the power transmission line, a first low voltage side connected to the voltage source converter and a second low voltage side connected to the switched elements.

Abstract: A method, converter arrangement, and controller are disclosed for connecting an output of a converter with an electrical grid to control inrush currents into a grid filter assembly connected with the output of the converter, the electrical grid carrying an alternating current (AC) signal having one or more phases. The method includes determining a voltage of the AC signal and operating, after pre-charging a direct current (DC) link of the converter to a predetermined voltage, the converter using open-loop voltage control to produce an AC output signal that substantially matches the AC signal of the electrical grid. The open-loop voltage control is based on the determined voltage of the AC signal. The method further includes closing, after a predetermined amount of time of operating the converter using the open-loop voltage control, a switching device to thereby connect the output of the converter with the electrical grid.

Abstract: Various aspects of a self-chargeable portable electronic device with a power generating circuitry and a method to charge a rechargeable battery by the power generating circuitry are disclosed. The power generating circuitry includes an accelerometer that is configured to generate a sensing pulse based on activation of the accelerometer. The power generating circuitry also includes a plurality of capacitors and one or more circuits. The one or more circuits are configured to receive the sensing pulse from the accelerometer. The plurality of capacitors are charged based on the received sensing pulse. The one or more circuits are configured to control transfer of power from the charged plurality of capacitors to a battery.

Abstract: Systems and methods of generating, storing and/or distributing electric power are disclosed. The system may include two or more direct current battery subsystems, a direct current motor/alternating current generator combination, an electric power distribution network, and battery recharging elements. One battery subsystem may power an alternating current generator while the other battery subsystem charges using a portion of the generated power. Excess power may service other electric loads. The roles of the battery subsystems may be switched periodically between charging and powering, repeatedly. A gear box may connect the electric motor and generator to adjust the relative rotational speeds of each for optimal performance of the system.

Abstract: A real-time data management system for accessing data in a power grid that controls a transmission delay of real-time data delivered via a real-time bus, and delivers real-time data in a power grid. A unified data model covering various organizations and various data resource may be included. Multi-bus collaboration and bus performance optimization approaches may be used to improve efficiency and performance of the buses. An event integration and complex event process component may be included to provide status of the power grid. A high volume of real-time data and events may be managed to provide data transmission with a low latency, provide flexible extension of the number of data clusters and the number of databases to ensure high volume data storage, and achieve a high speed and transparent data access. Additionally, rapid design and development of analytical applications, and the near real-time enterprise decision-making may be enabled.

Abstract: The invention relates to a parallelization method for black-start subsystems of a power grid with external support, which includes, after power blackout, partitioning the power grid into subsystems, and respectively performing black-start on the subsystems based on a power grid black-start research scheme, performing stability check on each subsystem, performing voltage calculation on parallel lines between the subsystems, checking the parallelizing simulation of the subsystems, and determining a feasible parallelizing path and a recommendable charging direction.

Abstract: A 2D/3D switching apparatus includes a switching layer that includes a cylindrical lens grating and a cavity defined by a cylindrical curved surface of the cylindrical lens grating and a cover, a container for storing a transparent liquid that has a refractive index equal to a refractive index of a material of the cylindrical lens grating, and a vacuum pump respectively connected with the cavity of the switching layer and the container. The vacuum pump injects the transparent liquid from the container to the cavity of the switching layer, or injects the transparent liquid from the cavity to the container.

Abstract: The invention is directed to real-time processing of video data. In some examples at least one image of the video data is processed utilizing reference data comprising reference image data of background within a region of interest and clutter image data indicative thereof, to determine a pixel deviation level of each pixel in the at least one image and generate pixel-deviation image data indicative thereof. The pixel-deviation image data is processed to enhance its tonal pixel distribution and generating enhanced image data, which is processed to determine a threshold level based on the tonal pixel distribution. A binary image map is then generated using the determined threshold level, the binary image map being indicative of the background and foreground components of the at least one image.

Abstract: A fraction inverter circuit includes a first energy storage device configured to output a DC voltage, a first bi-directional DC-to-AC voltage inverter coupled to the first energy storage device, and a first electromechanical device. The first electromechanical device includes a first plurality of conductors coupled to the first bi-directional DC-to-AC voltage inverter, a second plurality of conductors coupled together, and a plurality of windings coupled between the first plurality of conductors and the second plurality of conductors. The traction converter circuit also includes a charge bus comprising a first conductor coupled to the second plurality of conductors of the first electromechanical device, the charge bus configured to transmit a charging current to or receive a charging current from the first electromechanical device to charge the first energy storage device via the first electromechanical device and the first bi-directional DC-to-AC voltage inverter.

Abstract: Provided is a control circuit capable of efficiently supplying electric power from an alternating-current generator to a load, and a power generation device having this control circuit. A control circuit 1 for controlling electric power to be supplied from a power generator 5 to a battery 6 is provided with: a rate-of-change obtaining unit 11 configured to obtain a rate of change of a sensor cycle for a sensor signal synchronous with an operation of the power generator 5; an estimation unit 12 configured to estimate a next sensor cycle using the rate of change of the sensor cycle obtained by the rate-of-change obtaining unit; and an output-supply control unit 13 configured to perform PWM control of switching elements provided for a drive circuit 30 using the next sensor cycle estimated by the estimation unit 12.

Abstract: In one aspect, a system for operating a power generation system within a battery storage/discharge mode or a dynamic brake mode may generally include a power convertor having a DC link, a switching module coupled to the DC link and a selector switch configured to selectively couple the switching module to one of a storage device or a resistive element of the power generation system. The selector switch may be movable between a first position, wherein the switching module is coupled to the storage device such that power is capable of being directed between the DC link and the storage device via control of the switching module, and a second position, wherein the switching module is coupled to the resistive element such that power is capable of being directed between the DC link and the resistive element via control of the switching module.

Abstract: A power converter for an engine generator includes an insulative support that receives and supports circuit components for converting incoming AC power to desired power, such as power suitable for a welding application. One or more rectifier modules are provided that are received and supported by the support. Three such modules may be provided for receiving three phase power from a generator. DC power from the rectifier module is applied to DC bus plates. The plates may be coupled to capacitors. A power conversion circuit, such as a buck converter, is coupled to the DC bus plates to convert the DC power to output power.

Abstract: An electromagnetic braking system includes an electrically conductive disc coupled to a rotatable shaft of a power generation system. The rotatable shaft is operatively coupled to a prime mover and a generator. The electromagnetic braking system further includes an inducting unit for applying an electromagnetic braking torque on the electrically conductive disc when commanded by a control signal and a controller for receiving an activation signal from an activating unit, receiving a rotational signal from a rotational sensor coupled to the rotatable shaft or the generator, determining a control signal when the rotational signal is outside of a threshold, and, when the activation signal is active and the rotational signal is outside of the threshold, sending the control signal to the inducting unit to regulate a rotational dynamic of the rotatable shaft.

Abstract: The invention relates to a pumped storage power plant (1) comprising at least one lower storage space (11) that is arranged underground and at least one upper storage space (12) that is separate from the lower storage space and arranged above ground or underground, wherein the lower storage space (11) is arranged in a greater depth than the upper storage space (12), and comprising at least one liquid line (15, 16) that is/are guided within the upper storage space (12) and within the lower storage space (11) respectively and that is/are connected to at least one hydraulic force and/or work machine (26, 27) of the pumped storage plant or can be connected via switchable valves (28, 29), and comprising at least one pressurized gas line (17, 18) that is/are guided within the upper storage space (12) and within the lower storage space (11) respectively and that is/are connected to a pressurized gas force and/or work machine (21, 22) of the pumped storage power plant or can be connected via switchable valves (24, 25

Abstract: A system, in one embodiment, may include a static starter subsystem having detection logic for indicating a conductive state of a solid state semiconductor device. The detection logic includes a first logic gate having a first input that receives a first input signal indicating a state of the static starter subsystem, a second input that receives a second input signal indicating a state of a gate firing command being applied to the solid state semiconductor device, and a third input that receives a third input signal indicating whether the solid state semiconductor device is conducting. The first logic gate may be configured to evaluate the first, second, and third input signals and provide a first output signal indicating conductivity of the solid state semiconductor device in response to the gate firing command.

Abstract: A power system includes a prime mover configured to generate a drive force, a generator configured to receive the drive force and be driven by the prime mover to produce electrical power for an external load. The system includes a power storage device configured to store electrical power or to discharge electrical power to the external load. The system further includes a controller configured to control the power storage device to discharge power to supplement the electrical power from the generator directed to the external load.

Abstract: An electromagnetic braking system includes an electrically conductive disc coupled to a rotatable shaft of a power generation system for operating in an island mode. The rotatable shaft is operatively coupled between a prime mover and a generator for supplying power to an island grid. The electromagnetic braking system further includes a controller for receiving at least one status or synchronization signal and for generating a control signal based on the at least one signal and an inducting unit for applying an electromagnetic braking force on the electrically conductive disc when commanded by the control signal to regulate a rotational speed of the rotatable shaft.

Abstract: A reliable, eco-friendly, and reactive device for storing large amounts of recoverable energy with high overall energy efficiency enables the electrical energy on a grid to be collected when there is an abundant amount of available electrical energy on the grid, and redistributes the electrical energy to the grid when the electrical energy is running out. The device mainly includes a compact, dense ballast, the ballast having a matching hydrodynamic and aerodynamic shape, and a flow cavity suitable for holding energy corresponding to the maximum energy of the ballast in the cavity, the ballast being capable of moving along the main axis of flow in the cavity, the device further including an energy collection and recovery element and a control element. A braking coefficient and a safety factor are defined and adjusted on the basis of the nature of the movement of the ballast in the flow cavity.

Abstract: A method includes generating thrust at one or more engines of an aircraft. The method includes generating first electricity at a first power unit concurrently with generating second electricity at a second power unit. The first power unit and the second power unit are independent of the one or more engines of the aircraft. The first electricity has a first set of electrical characteristics and the second electricity has a second set of electrical characteristics, where the first set of electrical characteristics is different than the second set of electrical characteristics.

Abstract: A generator system includes an AC generator having one or more phases; a transformer having the same number of phase as the generator; for each phase of the AC generator, a capacitive element having a first terminal electrically connected to an output winding of the AC generator and a second terminal electrically connected to a primary winding of a respective phase of the transformer; a prime mover in driving engagement with the AC generator; and a load connected to a secondary winding of the transformer. A method to reduce the mechanical input to the AC generator includes reducing the counter torque of the generator system via a respective series connected capacitive element having a first terminal electrically connected to the output winding of the AC generator and a second terminal electrically connected to a primary winding of a respective phase of the transformer.

Abstract: An apparatus (100) couples to a vehicle (101) movable in relation to a medium (103). The vehicle (101) comprises a vehicle wheel (105) attached to an axle (107). The apparatus (100) comprises a driving wheel (110) configured to couple to the vehicle wheel (105) or to a vehicle axle (107) or to couple directly to the medium (103); a generator (120) configured to generate electrical power based on a rotation of the driving wheel (110), wherein the vehicle wheel (105) rotates upon a motion of the vehicle (101) as consequence of a friction of the vehicle (101) with the medium (103); a battery (130), configured to store the generated electrical power; and a control unit (140) configured to transform the generated electrical power to a predetermined level used for charging the battery (130).

Abstract: In a leisure vehicle, the load applied to an engine is controlled so that a driving property and an output are improved. The leisure vehicle has a generator 30 to be driven by the engine for generating power, and a power generation control device 42 for controlling the generator 30, wherein the power generation control device 42 increases or decreases a power generation amount of the generator 30 under a predetermined condition regarding the power generation amount of the generator 30 to be increased or decreased in accordance with an increase or a decrease in engine speed.

Abstract: The present invention provides coordinated control methods of generator and SVC for improving power plant active power throughput and controller thereof. The method comprises: measuring the required input parameters for the generator and SVC control; judging the system topology and the control mode of SVC to determine the operation mode; and calculating the control reference based on the operation mode to control the generator and/or SVC. The proposed methods and coordinated controllers enable the SVC to share the required reactive power output of the power plant, convert the generator into “unity-power-factor-generator”, and therefore extend the active power output capability of the power plant.

Abstract: An energy storage apparatus for storing energy transmitted by a power transmission line includes an elastically deformable component and an actuator-generator. The actuator-generator is coupled to the elastically deformable component such that electrical actuation of the actuator-generator generates tension in the elastically deformable component. The actuator-generator is further coupled to the elastically deformable component such that mechanical actuation of the actuator-generator via a release of tension in the elastically deformable component causes a generation of electrical energy by the actuator-generator.

Abstract: An inverter generator used in combination with a motor and an ECU generating a pulse at each predetermined rotation angle of the motor is comprised of: an electric generator driven by the motor configured to generate alternating current electric power; estimating means for estimating an electrical angle of alternating voltage of the alternating current electric power from the pulse, the estimating means being electrically connected with the ECU; a converter configured to convert the alternating current electric power into direct current electric power, the converter electrically connected with the electric generator and the estimating means; and an inverter configured to convert the direct current electric power into alternating current output electric power, the inverter electrically connected with the converter.

Abstract: Provided is a system for transporting an oil sand slurry, comprising a pump, upstream and downstream lines, a shaft connectable to the pump, a driving mechanism driving the pump and a regulator for regulating the torque applied to the shaft between positive and negative torque modes, to pump the slurry at higher or lower flow rates. Also provided is a method comprising pumping the slurry through a pipeline using a pump driven by a motorised shaft and adjusting the flow rate of the slurry by varying the torque applied to the motorised shaft between positive and negative torque modes. The oil sand slurry transportation system and method enable positive head (regular pump action) for normal and high flow rates and negative head (pump brake action) for low flow rates, which reduces system energy loss, pipeline wear, vapour breakout and sanding off.

Abstract: The present invention relates to a method of reactive power regulation in a wind turbine comprising a local reactive power control system adapted to operate in a central control mode and a local control mode, a method of reactive power regulation in a wind park connected to an electrical grid, and to a wind park.

Abstract: An apparatus for harvesting energy from motion of a human or animal body segment and providing the energy to an electrical load is disclosed. The apparatus comprises a generator operatively coupled to the body segment such that particular movement of the body segment causes the generator to output a generator current and to oppose the particular movement of the body segment with a generator torque. An electrical load is coupled to receive the generator current. A control system is operatively connected between the generator and the electrical load and is configured to control the generator torque during the particular movement of the body segment. Corresponding methods are also disclosed.

Abstract: A machine is described that includes an electric drive for propelling the machine along a ground surface. The machine includes an electric power supply system configured to deliver operating electrical power to the electric drive. The electric power system includes a first generator and a second generator. The electric power system also includes a first rectifier coupled to the first generator and having a first direct current (DC) output and a second rectifier coupled to the second generator and having a second DC output. Both the first DC output and the second DC output are coupled to the single DC bus, thereby providing an arrangement for the first rectifier and the second rectifier to simultaneously provide power to the single DC bus. The electrical power system also includes a first inverter/controller coupled to the single DC bus and configured to provide a controlled alternating current to a first motor.

Abstract: To provide a diesel hybrid vehicle system that does not need to additionally include a simulated sound generator and that is capable of achieving reduction in size, weight and cost of a vehicle. Not only during running of a vehicle, but even when a diesel engine is stopped at the time of starting up the vehicle or during braking control of the vehicle and when an output of the diesel engine is reduced during coasting of the vehicle, a propeller fan of a radiator is forcibly driven to generate a wind sound caused by the propeller fan.

Abstract: A tool cover for receiving a tool housing of a pneumatic tool is disclosed. The tool cover supports and aligns an inductor element of a stator with magnets of a rotor within the tool housing. The tool cover also supports a circuit to which the inductor element is electrically connected, where the circuit comprises a power conditioner for receiving current from the inductor element and conditioning the current to be acceptable for supply to a load that comprises one or more logic processing devices.

Abstract: A method and apparatus for improving power generation in a thermal power plant. A dynamic reactive compensation system is provided and is connected to a high voltage bus or a generator bus of the power plant. The dynamic reactive compensation system comprises power electronic devices and is operable to provide most of the reactive power that is required from the power plant.

Abstract: A method of controlling a plurality of gensets during a failsafe condition is provided. The method may include operating one or more of the gensets according to a modified isochronous control scheme, and operating a remainder of the gensets according an adaptive droop control scheme. The modified isochronous control scheme may include varying the frequency of each isochronous genset with respect to load for lower-range loads and upper-range loads, and maintaining the frequency of each isochronous genset at nominal frequencies for mid-range loads. The adaptive droop control scheme may include adjusting the frequency of each droop genset to match the frequency of the isochronous gensets, and varying the load of each droop genset with respect to frequency for lower-range loads and upper-range loads.

Abstract: Embodiments of the present disclosure provide systems and apparatus for generating power from pressurized natural gas. The system may include an on-site pressure turbine for using some of the available energy of the pressurized natural gas to power an air compressor and/or electric generator. The turbine is driven by the expansion of natural gas due to a pressure differential and/or by the velocity of natural gas as it travels through a pipeline. In some embodiments, the turbine output is used to generate compressed air, which is used on-site to power pumps and switches. In some embodiments, the turbine output is used to generate electricity, which is then used on-site to power communications equipment and sensors. In some embodiments, a gear reduction system is used to adapt the turbine output to useful levels.

Abstract: A shovel includes an internal combustion engine whose revolution speed is controlled to be constant, a hydraulic pump connected to the internal combustion engine, a generator connected to the internal combustion engine, and a control unit for controlling the generator, wherein the control unit causes the generator to perform an electrical power generating operation in a case where a load on the hydraulic pump is increasing.

Abstract: A load bank comprises one or more load resistors connected to an engine-generator and a control system for maintaining a minimum generator load when necessary for optimal operation. The control system operates the load bank to mitigate harmful effects of generator neglect and maintains loading for efficient DPF regeneration while allowing the generator to quickly dump the load bank when real load increases.

Abstract: An inverter generator includes a motor, an electric generator and an ECU generating a pulse at each predetermined rotation angle of the motor. Estimating means estimates an initial electrical angle of alternating voltage produced by the generator from the pulse and calculates a phase shift angle to estimate continuous electrical angle of the alternating voltage. A converter converts the alternating current electric power into direct current electric power under d-q control based on the phase shift angle. An inverter converts the direct current electric power into alternating current output electric power.

Abstract: A machine is described that includes an electric drive for propelling the machine along a ground surface. The machine includes an electric power system having a first generator and a second generator. The electric power system also includes a first rectifier coupled to the first generator and having a first direct current (DC) power output and a second rectifier coupled to the second generator and having a second DC power output. Both the first DC output and the second DC output are coupled to the single DC bus, thereby providing an arrangement for the first rectifier and the second rectifier to simultaneously provide power to the single DC bus. A power balancer control receives power commands from both the first and the second ECMs and issues a corrective voltage adjustment to at least one of the first and second ECMs.

Abstract: A power system includes a prime mover configured to generate a drive force, a generator configured to receive the drive force and be driven by the prime mover to produce electrical power for an external load. The system includes a power storage device configured to store electrical power or to discharge electrical power to the external load. The system further includes a controller configured to control the power storage device to discharge power to supplement the electrical power from the generator directed to the external load.

Abstract: A controller for a power generating system that includes an engine and a generator, wherein the engine provides mechanical force to the generator, which converts the mechanical force to electrical energy that is distributed via a distribution network. The controller includes a complementary filter that applies a low-frequency response to changes in the monitored power output and a high-frequency response to changes in the monitored grid frequency. The complementary filter combines outputs of the high-frequency response and low-frequency response to generate a process variable. A feedback controller generates a fuel flow value in response to the process variable.